h1. Android

OpenCV4Android homepage is here: http://opencv.org/android. This wiki is for co-developers.

h2. Submitting a bug

Have you done your homework? Let's check it:

# Please check that you use the "latest version":http://opencv.org/downloads.html of OpenCV4Android. Please also check [[Android_Release_Notes|Release Notes]].

# Please check the open "Android issues":http://code.opencv.org/projects/opencv/issues?query_id=4 on the tracker.

# Ask "community":http://www.answers.opencv.org/ about your problem. May be your question was already "asked":http://www.answers.opencv.org/questions/scope:all/sort:activity-desc/tags:android/page:1/?

If you submit a ticket, please provide the correct "Category" name - @android@. If you could not identify the cause of the error, please provide the following information in your ticket:

* Version number of Android platform (all 3 components of the version - for example: 4.0.4). If you use custom ROM, name and version, for example cyanogenmod 9;

* Full device model, for example Nexus 7 3G.

* Exact CPU model of your device ("@adb shell cat /proc/cpuinfo@" command);

* Output of "@adb logcat@" command. See section bellow how to get it in the right way;

* Name of a sample if the problem is reproducible for any of the samples included into the binary package. Your own reproducer will be useful too.

* If you can create a failing [[Android Java API tests|JUnit test]], it may greatly help us.

h2. Logcat output

1. Open console (cmd.exe for Windows, Konsole, terminal on Linux and Mac OS X)

2. Clear logcat log by command adb logcat -c

3. Redirect logcat output to file by command adb logcat > [path_to_log]/app_crash.log

4. Run application and reproduce its crash

5. Interrupt log file writing by pressing Ctrl+C in terminal, where logcat was running

6. Attach log to the ticket as text file or in archive.

h2. Developer documentation

* [[Building OpenCV4Android from trunk|Building OpenCV4Android from trunk]].